Hal 9000 said:
I like it! The clip we have to work with has a hologram or radio filter on it, so that may make it less than ideal to modify.
In that clip, after Palpatine says “the work of generation is complete” there’s a few seconds with just the hologram filter and no dialogue. This could be looped over whatever modification you want to make 😉
Edit: Here’s the source for the sound affect used: